Results 91 to 100 of about 2,213,777 (304)
Alignment and morphology of elliptical galaxies: the influence of the cluster tidal field
, 1994 We investigate two possible effects of the tidal field induced by a spherical cluster on its elliptical galaxy members: the modification of the ellipticity of a spherical galaxy and the isophotal alignment in the cluster radial direction of a misaligned ...
Ciotti, L., Dutta, S. N.
core +1 more source
Low X-Ray Luminosity Galaxy Clusters: Main goals, sample selection, photometric and spectroscopic observations [PDF]
, 2016 We present the study of nineteen low X-ray luminosity galaxy clusters (L$_X \sim$ 0.5--45 $\times$ $10^{43}$ erg s$^{-1}$), selected from the ROSAT Position Sensitive Proportional Counters (PSPC) Pointed Observations (Vikhlinin et al.
Alonso, M. V. +12 more
core +3 more sources
Cluster Membership of Galaxies Using Multi-Layer Perceptron Neural Network
Universe, 2022 In this study, we report systematic investigations of the membership of galaxies inside a cluster using a machine learning (ML) neural network. By directly assigning the membership, rather than estimating the galaxy redshift as an intermediate step, we ...
Yasuhiro Hashimoto, Cheng-Han Liu
doaj +1 more source
Simulations of the merging galaxy cluster Abell 3376 [PDF]
, 2013 Observed galaxy clusters often exhibit X-ray morphologies suggestive of recent interaction with an infalling subcluster. Abell 3376 is a nearby (z=0.046) massive galaxy cluster whose bullet-shaped X-ray emission indicates that it may have undergone a ...
R. E. G. Machado, G. L. Neto
semanticscholar +1 more source
A SYSTEMATIC ANALYSIS OF CAUSTIC METHODS FOR GALAXY CLUSTER MASSES [PDF]
, 2013 We quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters.
D. Gifford, C. Miller, N. Kern
semanticscholar +1 more source
The Galaxy Population of Low-Redshift Abell Clusters
, 2009 We present a study of the luminosity and color properties of galaxies selected from a sample of 57 low-redshift Abell clusters. We utilize the non-parametric dwarf-to-giant ratio (DGR) and the blue galaxy fraction (fb) to investigate the clustercentric ...
Abraham +34 more
core +1 more source
Properties of the Environment of Galaxies in Clusters of Galaxies CL 0024+1654 and RX J0152.7−1357
Journal of Mathematical and Fundamental Sciences, 2021 We report the results of combined analyses of X-ray and optical data of two galaxy clusters, CL 0024+1654 and RX J0152.7−1357 at redshift z = 0.395 and z = 0.830, respectively, offering a holistic physical description of the two clusters.
Premana Wardayanti Premadi +2 more
doaj +1 more source
Simulating the formation of a proto-cluster at z~2
, 2008 We present results from two high-resolution hydrodynamical simulations of proto-cluster regions at z~2.1. The simulations have been compared to observational results for the socalled Spiderweb galaxy system, the core of a putative proto-cluster region at
Borgani, S. +5 more
core +1 more source
Globular cluster formation in the context of galaxy formation and evolution [PDF]
, 2014 The formation of globular clusters (GCs) remains one of the main unsolved problems in star and galaxy formation. The past decades have seen important progress in constraining the physics of GC formation from a variety of directions.
J. M. Diederik Kruijssen
semanticscholar +1 more source
Evolution of galaxies in clusters
The Astrophysical Journal, 1994 33 pages, normal ...
Joseph Silk, Stephane Charlot
openaire +4 more sources